allow empty relations for RAM and CPUs

network_inventory/inventory/templates/inventory/computer_details.html

@@ -4,8 +4,26 @@
     <h3>Description</h3>
     <p>{{ computer.description }}</p>
     <p><b>OS: </b>{{ computer.os }}</p>
-    <p><b>CPU: </b>{{ cpu.amount }}x {{ cpu.cpu }}</p>
-    <p><b>RAM Modules: </b>{{ ram.amount }}x {{ ram.ram }}</p>
+    {% if cpu_list %}
+    <p><b>CPUs:</b></p>
+    <p>
+        <ul>
+            {% for cpu in cpu_list %}
+                <li>{{ cpu.amount }}x {{ cpu.cpu }}</li>
+            {% endfor %}
+        </ul>
+    </p>
+    {% endif %}
+    {% if ram_list %}
+    <p><b>RAM Modules:</b></p>
+    <p>
+        <ul>
+            {% for module in ram_list %}
+                <li>{{ module.amount }}x {{ module.ram }}</li>
+            {% endfor %}
+        </ul>
+    </p>
+    {% endif %}
     {% if disks_list %}
     <p><b>Disks:</b></p>
     <p>

network_inventory/inventory/views.py

@@ -19,13 +19,13 @@ def device_details(request, device_id):
 def computer_details(request, computer_id):
     computer = get_object_or_404(Computer, pk=computer_id)
     disks_list = ComputerDiskRelation.objects.filter(computer=computer_id)
-    ram = ComputerRamRelation.objects.get(computer=computer_id)
-    cpu = ComputerCpuRelation.objects.get(computer=computer_id)
+    ram_list = ComputerRamRelation.objects.filter(computer=computer_id)
+    cpu_list = ComputerCpuRelation.objects.filter(computer=computer_id)
     return render(request, 'inventory/computer_details.html',
                   {'computer': computer,
                    'disks_list': disks_list,
-                   'ram': ram,
-                   'cpu': cpu})
+                   'ram_list': ram_list,
+                   'cpu_list': cpu_list})
 
 
 class CustomerList(ListView):